Adding cv_backports to package.xml

[ugocupcic]

Otherwise I get the error:

CMake Error at /opt/ros/indigo/share/catkin/cmake/catkin_package.cmake:189 (message):
  catkin_package() the catkin package 'cv_backports' has been
  find_package()-ed but is not listed as a build dependency in the
  package.xml

[vrabaud]

actually, it is not required on master anymore (which is Kinetic and above). So it should be removed from the CMake instead. Thx for updating your PR.
Now, I don't understand why that worked on the build farm ...

[ugocupcic]

@vrabaud OK sorry! Updated the pr (if I understood correctly)

[vrabaud]

oh wait, that was supposed to work. Are you on Indigo by any chance ? You should checkout the Indigo branch then.

[ugocupcic]

Ah! OK, you wouldn't have the equivalent of this rosinstall but for indigo by any chance?

[vrabaud]

good point, I did not update that rosinstall. Will do tonight.
For now, switching ecto_opencv to the indigo branch is the only thing to do I believe.

[vrabaud]

@ugocupcic , I fixed the rosinstall files here: http://wg-perception.github.io/object_recognition_core/install.html#rosinstall-file
Thx for reporting !